US5106442A - Method for producing collar reinforcements on cylindrical composite fiber bodies - Google Patents

Method for producing collar reinforcements on cylindrical composite fiber bodies Download PDF

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Publication number
US5106442A
US5106442A US07/547,285 US54728590A US5106442A US 5106442 A US5106442 A US 5106442A US 54728590 A US54728590 A US 54728590A US 5106442 A US5106442 A US 5106442A
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US
United States
Prior art keywords
composite fiber
fiber body
bead
surface portion
clamping sleeves
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
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US07/547,285
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English (en)
Inventor
Horst Corr
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Uranit GmbH
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Uranit GmbH
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Publication date
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Assigned to URANIT GMBH reassignment URANIT GMBH ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: CORR, HORST
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/56—Winding and joining, e.g. winding spirally
    • B29C53/58—Winding and joining, e.g. winding spirally helically
    • B29C53/583—Winding and joining, e.g. winding spirally helically for making tubular articles with particular features
    • B29C53/587—Winding and joining, e.g. winding spirally helically for making tubular articles with particular features having a non-uniform wall-structure, e.g. with inserts, perforations, locally concentrated reinforcements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing

Definitions

  • the present invention relates to a method for producing collar or flange shaped reinforcements on cylindrical composite fiber bodies, and particularly on wound composite fiber pipes or tubes, in which several layers of resin impregnated fiber layers are wound on top of one another along the regions of the composite body to be reinforced, after which the resin is hardened.
  • German Patent No. 3,029,890 which corresponds to U.S. Pat. No. 4,359,356, discloses a method of producing composite fiber pipes which have collar or flange shaped reinforcements at the ends of the pipes.
  • several layers of circumferential and crisscross windings of plastic impregnated fibers, e.g. carbon fibers are initially wound on top of one another on a winding mandrel.
  • additional circumferential windings are applied along the regions of the composite pipe to be reinforced.
  • the composite pipe is severed at the reinforced regions so that several pipe sections are obtained which have flange-like reinforced ends.
  • the reinforcements obtained with this method have a thickness that is little more than the wall thickness of the composite pipe since the fiber windings at the sides of the reinforcements have a relatively flat slope angle, also referred to as a natural angle, i.e. the steepest angle which can be produced during winding as a consequence of the physical properties of the fiber being wound and the geometry of the structure formed by the winding process.
  • these sides of the reinforcements take up additional space as compared with a reinforcement having orthogonal flange walls. This is a primary reason why it is not possible using this type of known technology, i.e.
  • a collar is produced on a cylindrical composite fiber body, wherein the composite fiber body has a longitudinal axis and wherein a plurality of layers of resin impregnated fiber windings are wound to form the composite fiber body, after which the resin is hardened, including the steps of:
  • each clamping sleeve having an end face extending substantially orthogonally to the longitudinal axis of the composite fiber body, a conical surface portion adjacent the end face, and an interior surface portion which is adjacent the conical surface portion and which conforms to the outer surface of the cylindrical composite fiber body;
  • the bead can be formed to further include at least one band of woven fibers in the bead which are wound during the above-mentioned step (a).
  • a release agent is applied to each end face, each conical surface portion, and each interior surface portion.
  • the cylindrical composite fiber body is wound about a mandrel, wherein the clamping sleeves have the same coefficient of thermal expansion as that of the mandrel.
  • each of the clamping sleeves is maintained at the same temperature as that of the mandrel.
  • the present invention makes it possible to produce, on a closely defined region of the composite body, a collar or flange of predetermined thickness and height without notch stresses and with end faces or end face portions that extend perpendicularly to the longitudinal axis of the pipe. Subsequent milling work, which might adversely affect strength, is not required.
  • FIG. 1 schematically illustrates a side elevational view of a cylindrical composite fiber body wound about a mandrel, a bead being formed on the cylindrical composite fiber body.
  • FIG. 2 is a schematic, enlarged view of the bead of FIG. 1 with a clamp disposed on either side of the bead and a collar wound on the bead between the clamps.
  • FIG. 3 is a schematic side view of the finished collar of FIG. 2 on the cylindrical composite fiber body.
  • FIG. 4 is a perspective view of a clamp usable in the present invention.
  • a bead 3 of fibers impregnated with synthetic resin is formed by winding fibers onto a still "wet" composite fiber pipe 2 which is wound around a mandrel 1 as shown in FIG. 1.
  • the mandrel is rotatable in the direction indicated by the arrow R about an axis 10.
  • the bead 3 is formed by the winding of fibers along a region to be reinforced and has longitudinally spaced flanks 3a and 3b which slope on both sides of the bead 3 at a "natural" angle, i.e. the steepest angle which can be produced during winding as a consequence of the physical properties of the fiber being wound and the geometry of the structure formed by the winding process.
  • a woven band 3c can also be formed which is wound into the bead 3 so as to increase the bending strength of the collar or flange to be produced.
  • Two clamping sleeves 4 and 5 having respective frontal faces 4c and 5c and bores 9a, 9b, and 9c as shown in FIG. 2, are positioned on either side of the bead 3. Then, the clamping sleeves 4 and 5 are respectively pressed against the two flanks 3a and 3b of the bead 3. Following this, the sleeves 4 and 5 are tightened together to form an annular space between the faces 4c and 5c.
  • the annular space formed between the two frontal faces 4c and 5c is filled with further fiber windings 6 of synthetic resin impregnated fibers, e.g. carbon fibers, so as to form a collar having side walls which are substantially orthogonal to the longitudinal axis of the mandrel.
  • a collar 7 is thereby formed, as shown in FIG. 3.
  • the collar 7 is integral with the pipe 2 since the bead 3 as well as the windings 6 are applied while the pipe 2 is still "wet".
  • the flanks 3a and 3b of the collar 7 form a natural transition region between the pipe 2 and the perpendicular end faces 7a and 7b, and this transition region prevents the development of notch stresses.
  • the collar 7 can be severed in a direction which is perpendicular to the longitudinal axis of pipe 2, i.e. along a separation line 8, as shown in FIG. 3, to form two separate pipe sections 2a and 2b, each of the separate pipe sections 2a and 2b having a respective wound-on collar 7c or 7d.
  • the clamping sleeves 4 and 5 are preferably composed of a spring elastic material.
  • the sleeve 4 is shown in detail in FIG. 4 and is similar in construction to the sleeve 5.
  • the sleeve 4 has a longitudinal slot 9 which is parallel to the longitudinal axis of the mandrel 9.
  • the sleeve 4 is penetrated by several clamping screws which extend through bore 9a, 9b, and 9c and which bridge the slot 9 to compress the sleeve 4 so as to reduce the width of the slot 9.
  • the inner surface of the clamping sleeve 4 has a cylindrical portion 4a which closely corresponds to the outer surface of the pipe 2.
  • the interior surface of the sleeve 4 changes from the cylindrical interior shape of the cylindrical portion 4a to a conical shape of an interior portion of a conical region 4b.
  • the conical region 4b is shaped to conform to the flank 3a of the bead 3
  • the end face 4c follows the conical region 4b and has a height relative to the outer surface of the pipe 2 which is at least equal to the height of the collar 7 relative to the pipe 2.
  • the clamping sleeves 4 and 5 preferably have the same coefficient of thermal expansion as the winding mandrel 1 and are maintained during use at the same temperature as the mandrel 1.
  • a release agent is applied to the faces 4a 4b 4c of the clamping sleeves, since these faces come in contact with the synthetic resin.
  • sleeves having two or more parts may also be employed. These multi-part sleeves would likewise be placed about the mandrel 1 and the fiber pipe 2, and then tightened against the pipe 2 and the bead 3 by screws or other tightening means, e.g. tightening bands.
  • the end faces 4c and 5c of the clamping sleeves 4 and 5, respectively may be modified so that the space between the end faces 4c and 5c, which is to be filled with fiber windings, has, for example, stepped end faces or concave end faces.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulding By Coating Moulds (AREA)
US07/547,285 1989-07-07 1990-07-03 Method for producing collar reinforcements on cylindrical composite fiber bodies Expired - Fee Related US5106442A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3922335 1989-07-07
DE3922335A DE3922335C1 (enrdf_load_stackoverflow) 1989-07-07 1989-07-07

Publications (1)

Publication Number Publication Date
US5106442A true US5106442A (en) 1992-04-21

Family

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US07/547,285 Expired - Fee Related US5106442A (en) 1989-07-07 1990-07-03 Method for producing collar reinforcements on cylindrical composite fiber bodies

Country Status (4)

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US (1) US5106442A (enrdf_load_stackoverflow)
EP (1) EP0406596B1 (enrdf_load_stackoverflow)
JP (1) JPH0345333A (enrdf_load_stackoverflow)
DE (1) DE3922335C1 (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5225016A (en) * 1991-08-02 1993-07-06 Rohr Industries, Inc. Method of manufacturing an advanced composite duct having integral ribs
US6210283B1 (en) 1998-10-30 2001-04-03 General Electric Company Composite drive shaft

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4404235C1 (de) * 1994-02-10 1995-01-05 Urenco Deutschland Gmbh Verfahren zum Herstellen eines Spalttopfes aus Faserverbundwerkstoff
DE102004038706B4 (de) * 2004-03-02 2007-12-20 East-4D Gmbh Lightweight Structures Vorrichtung zur Herstellung von Faserverbundbauteilen, insbesondere schnelllaufender Rotoren, namentlich Zentrifugenrotoren
AU2005244809B2 (en) 2004-05-12 2013-02-28 Charlotte-Mecklenburg Hospital Authority Doing Business As Carolinas Medical Center Mobile medical facility
DE102008028337B4 (de) * 2008-06-13 2013-09-26 Ellergon Antriebstechnik Gmbh Verfahren zur Herstellung einer Hohlwelle mit mindestens einem integralen Flansch aus Faserverbundwerkstoff
DE102015102437B4 (de) 2014-02-20 2021-02-04 East-4D Carbon Technology Gmbh Verfahren zur Herstellung einer Verstärkung für Flanschstrukturen aus Faserverbundwerkstoff
DE102017101346A1 (de) * 2017-01-25 2017-12-28 Voith Patent Gmbh Verfahren zum herstellen eines rohres

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4049482A (en) * 1976-02-27 1977-09-20 Webb James W Method and apparatus for forming flanges
DE3029890A1 (de) * 1980-08-07 1982-03-11 URANIT, Uran-Isotopentrennungs-Gesellschaft mbH, 5170 Jülich Verfahren und vorrichtung zum herstellen faserverstaerkter wickelkoerper
US4605385A (en) * 1978-09-07 1986-08-12 Ciba-Geigy Corporation Fibre reinforced plastics power transmission shaft
US4980006A (en) * 1987-11-11 1990-12-25 Ameron, Inc. Method for making a fiber-reinforced pipe flange

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2744043A (en) * 1950-01-23 1956-05-01 Fels & Company Method of producing pressure containers for fluids
US2843153A (en) * 1953-08-17 1958-07-15 Richard E Young Filament wound hollow elements and methods for making same
DE1753803C3 (de) * 1967-05-01 1978-11-16 Standard Oil Co., Chicago, Ill. (V.St.A.) Verfahren zum Herstellen eines in Längsrichtung und im wesentlichen in Umfangsrichtung verstärkten Kunststoffrohres
DE2738982C2 (de) * 1977-08-30 1983-01-27 Chemische Werke Hüls AG, 4370 Marl Verfahren zum Herstellen eines Flansches an Kunststoffrohren

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4049482A (en) * 1976-02-27 1977-09-20 Webb James W Method and apparatus for forming flanges
US4605385A (en) * 1978-09-07 1986-08-12 Ciba-Geigy Corporation Fibre reinforced plastics power transmission shaft
DE3029890A1 (de) * 1980-08-07 1982-03-11 URANIT, Uran-Isotopentrennungs-Gesellschaft mbH, 5170 Jülich Verfahren und vorrichtung zum herstellen faserverstaerkter wickelkoerper
US4359356A (en) * 1980-08-07 1982-11-16 Uranit Uran-Isotopentrennungsgesellschaft Mbh Method and apparatus for production of fiber reinforced wound bodies
US4980006A (en) * 1987-11-11 1990-12-25 Ameron, Inc. Method for making a fiber-reinforced pipe flange

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5225016A (en) * 1991-08-02 1993-07-06 Rohr Industries, Inc. Method of manufacturing an advanced composite duct having integral ribs
US6210283B1 (en) 1998-10-30 2001-04-03 General Electric Company Composite drive shaft

Also Published As

Publication number Publication date
JPH0345333A (ja) 1991-02-26
EP0406596A1 (de) 1991-01-09
DE3922335C1 (enrdf_load_stackoverflow) 1990-07-05
EP0406596B1 (de) 1993-05-19

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